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| Mirrors > Home > MPE Home > Th. List > nnexpcl | Structured version Visualization version Unicode version | ||
| Description: Closure of exponentiation of nonnegative integers. (Contributed by NM, 16-Dec-2005.) |
| Ref | Expression |
|---|---|
| nnexpcl |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nnsscn 11025 |
. 2
| |
| 2 | nnmulcl 11043 |
. 2
| |
| 3 | 1nn 11031 |
. 2
| |
| 4 | 1, 2, 3 | expcllem 12871 |
1
|
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